Macro constraint 

macro_rules! constraint {
    (($lhs:expr) <= $rhs:expr) => { ... };
    (($lhs:expr) >= $rhs:expr) => { ... };
    (($lhs:expr) == $rhs:expr) => { ... };
    ($lhs:ident <= $rhs:expr) => { ... };
    ($lhs:ident >= $rhs:expr) => { ... };
    ($lhs:ident == $rhs:expr) => { ... };
}

Build a Constraint using natural inequality syntax.

Examples

use otspot_model::{Model, constraint};
let mut model = Model::new("demo");
let x = model.add_var("x", 0.0, f64::INFINITY);
let y = model.add_var("y", 0.0, 10.0);
model.add_constraint(constraint!((2.0 * x + 3.0 * y) <= 12.0));
model.add_constraint(constraint!((x + y) >= 3.0));

Build a Constraint using natural inequality syntax.

Supported forms:

• constraint!(x <= 5.0) — single variable on the left
• constraint!((expr) <= rhs) — parenthesised expression on the left

For complex LHS expressions, wrap them in parentheses:

model.add_constraint(constraint!((2.0 * x + 3.0 * y) <= 12.0));

or use the method API directly:

model.add_constraint((2.0 * x + 3.0 * y).leq(12.0));